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No exploitation reportedFix available

CVE-2017-17688

No exploitation reported by the sources we read.

  • Published2018-05-16

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification

Timeline

dates in UTC
  1. 2018-05-1619:29CVE publishedNVD

Versions per branch

NVD
Apple mail
BranchAffectedFixed in
—all versionsno fix published
Bloop airmail
BranchAffectedFixed in
—all versionsno fix published
Emclient
BranchAffectedFixed in
—all versionsno fix published

8 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • enigmailSUSE:Package Hub 12all versions · fixed in 2.0.4-9.1
  • enigmailopenSUSE:Tumbleweedall versions · fixed in 2.2.4-1.4
  • enigmailDebian:11all versions · fixed in 2:2.0.6.1-4

Vendor advisories

  • CVE-2017-17688 Red Hat Product Security

    OpenPGP: CFB gadget attacks allows to exfiltrate plaintext out of encrypted emails

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2017-17688 · 12 productsThe easiest way to mitigate this vulnerability is not to use HTML emails. If you really need to use them ensure that MUA clients disable external links embedded in HTML emails. For example in thunderbird email client, Edit->Preferences->Privacy->Disable "Allow remote content in messages".

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2018-05-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-87q6-mg5f-mp98

Frequently asked questions

What is CVE-2017-17688?

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification

Is CVE-2017-17688 actively exploited?

Active exploitation of CVE-2017-17688 has not been confirmed. Its EPSS score was 5.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-17688?

CVE-2017-17688 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record